Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Idaho.
Habitat: Seeps, gravel shores, peatlands, and wet meadows.
Flowers: June-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Threatened in Washington (WANHP)
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PNW Herbaria: Specimen records of Juncus howellii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Juncus howellii checklist entry.
OregonFlora: Juncus howellii information.
E-Flora BC: Juncus howellii atlas page.
CalPhotos: Juncus howellii photos.
USDA Plants: Juncus howellii information.